DIGITEN 4 Digital LED Tachometer RPM Speed Meter+Hall Proximity Switch Sensor NPN Red

Power requirement:DC 8-15V Measure range : 5-9999RPM.Clear zero: Automatic.Clear zero time:about 10s.the greater the RPM value,the longer the clear zero time.Refresh frequency: 0.2-0.5S@120-1200RPM,0.25-0.06S@2400-9999RPM.Display:RED 0.56 inch LED Sign:Pusle signal,Hall NPN 3 wires normally open.Hall proximity model:NJK-5002C Appearance:M12mm cylinder.Detection range: 10mm Proximity output current: 200mA Detected objects: magnet Response frequency: 100HZ Tachometer dimension:72x36x20mm,panel cutout Dimension:68x33mm.Sensor dimention: M12x10x55mm.Sensor wiring:brown-Power+,blue-Power-,black-signal.Operating temperature: 0 to 50℃.Packaging include Tachometer x 1 Hall NPN proximity sensor x 1 '